Encyclopedia7 min read
Northern Kelp Crab (Pugettia producta): Species Profile
The northern kelp crab is a colour-changing spider crab that lives its whole life in the kelp canopy. Learn its biology, diet, and role in the forest.
Dr. Theo Nakamura ·
The Tidewright Journal
Everything we know about growing back the ocean.
Encyclopedia entries, coastal atlas guides, science explainers, farming know-how and recipes — written by Tidewright’s scientists, engineers, chefs and field crews, and open to everyone.
Kitchen9 min read
Onigirazu: The Nori Rice Sandwich, Mastered
The layered nori rice sandwich that holds almost any filling — rice ratios, the fold that never fails, fillings that travel, and how to keep the nori crisp.
Sofia Andersson ·
Encyclopedia7 min read
Pacific Tube Anemone: The Flower of the Forest's Sandy Floor
The Pacific tube anemone isn't a true anemone at all. Meet Pachycerianthus fimbriatus: the felt-tubed, double-crowned ambush fisher of kelp-forest sand flats.
Dr. Mara Ellison ·
Science9 min read
Phlorotannins: The Chemical Armour of Brown Algae
Phlorotannins are the brown algae's chemical shield against grazers, microbes and UV. What they are, how they work, and why the defence story is nuanced.
Dr. Theo Nakamura ·
Encyclopedia8 min read
Giant Red Sea Cucumber (Apostichopus californicus): The Seafloor's Vacuum
Giant red sea cucumbers vacuum the kelp forest floor, recycle nutrients and buffer reef chemistry — and global fisheries show what happens when they're gone.
Naomi Reyes ·
Encyclopedia7 min read
Reef Surfperch (Micrometrus aurora): The Surf Zone's Quiet Resident
Small, barred and easy to overlook, the reef surfperch works the noisy seam where kelp forest meets breaking surf — and gives birth to fully formed young.
Dr. Mara Ellison ·
Science8 min read
Kelp Under Ice: How Polar Forests Survive the Dark Months
How polar kelp survives months of darkness: the physiology of Arctic forests, light under sea ice, carbohydrate hoarding and the mad sprint of spring.
Dr. Theo Nakamura ·
Farming12 min read
Biosecurity on a Seaweed Farm: Keeping Hitchhikers and Disease Out
A practical biosecurity system for kelp farms: the pest vectors that matter, zoning and quarantine design, and what to do in the first 48 hours of an outbreak.
Naomi Reyes ·
Blue Carbon9 min read
Carbon Claims on Seaweed Products: What's Defensible and What Isn't
Kelp snacks and seaweed straws carry big carbon claims. What a product-level footprint can honestly say, what it can't, and how to spot the difference.
Priya Raman ·
Blue Carbon7 min read
The Seaweed-Sinking Debate in 2026: Promise, Peril and the Case for Caution
Seaweed sinking is the most contested idea in ocean carbon removal. Where the science has settled, where it hasn't, and five tests before crediting a tonne.
Dr. Lena Fischer ·
Farming8 min read
From Line to Buyer: How the Seaweed Value Chain Works
Seaweed's value chain from harvest line to buyer: how wet and dried kelp is priced, where margin leaks out, and how to keep more of the value on-farm.
Naomi Reyes ·
Field Notes9 min read
Spore Season: Collecting Two Weeks of a Forest's Future
A field note from our Tasmanian nursery: two autumn weeks diving for fertile giant kelp blades, racing spores to tanks, and banking a forest's next generation.
Jack Callum ·
Farming11 min read
Tank Nursery or Open-Water Nursery: Choosing Your Seaweed Seed System
Land-based tank nurseries and open-water seed systems each win in different conditions. How to match your seaweed nursery design to species, budget, climate and scale.
Naomi Reyes ·
Field Notes9 min read
The Genetics Drawer: Inside Tidewright's Gametophyte Bank
A Tidewright field note from the coldest corner of our hatchery: the gametophyte bank, where microscopic kelp cultures wait in the dark for the reefs that will need them.
Dr. Elias Brandt ·
Field Notes9 min read
Training the New Dive Crew: A Fortnight with the Kudjela Rangers
Two weeks in Tasmania building the Kudjela Rangers' dive survey crew: skills assessments, safety drills, and the moment a new surveyor out-dove her instructor.
Jack Callum ·
Explore8 min read
Underwater Photography with Just a Phone: Housings, Settings and Kelp-Forest Shots That Work
You don't need a camera rig to shoot the kelp forest. Phone housings that work, settings that matter, and the surface-level shots phones do beautifully.
Tom Okafor ·
Farming12 min read
Urchin Ranching on Kelp: Turning Barrens Into Uni
Urchin ranching collects starving urchins from barrens and fattens their roe on kelp feed — a fishery, a farm and a restoration tool in one. Here's how it actually works.
Naomi Reyes ·
Encyclopedia8 min read
Aggregating Anemone: The Clone Army of the Rocky Shore
Aggregating anemone (Anthopleura elegantissima) species profile: clonal armies, tentacle wars, symbiotic algae and survival at the top of the rocky shore.
Dr. Mara Ellison ·
Atlas9 min read
Kelp Coasts of the Baltic Sea: Seaweeds at the Edge of Salinity
A coastal atlas guide to the Baltic Sea, where salinity drops below what most kelp can survive and bladderwrack forests rule a brackish inland sea.
Dr. Mara Ellison ·
Blue Carbon10 min read
Who Benefits? Designing Benefit-Sharing in Blue Carbon Projects
How blue carbon projects can share revenue, jobs and decision power fairly with coastal communities — models, safeguards and the questions to ask first.
Priya Raman ·
Encyclopedia8 min read
Buffalo Sculpin (Enophrys bison): The Horned Ambush Hunter of Kelp Beds
Profile of the buffalo sculpin — its jutting preopercular spines, reported venom, bright guarded egg masses and life in northeast Pacific kelp beds.
Dr. Mara Ellison ·
Encyclopedia8 min read
California Sheephead (Semicossyphus pulcher): Species Profile
The California sheephead is a sex-changing kelp-forest wrasse whose jaws keep sea urchins in check. Learn its life history, role and recovery story.
Dr. Mara Ellison ·
Atlas9 min read
The Cape Peninsula: Kelp Forests at the Edge of Africa
Guide to the Cape Peninsula's kelp forests: two oceans, sea bamboo, seals and sharks, freediving culture, and how a warming world is shifting the reefs.
Tom Okafor ·
Atlas8 min read
The Channel Islands: California's Kelp Forest Crown Jewels
Where cold northern and warm southern currents collide, the Channel Islands grow California's grandest kelp forests — protected by national park and marine reserves.
Sofia Andersson ·